TABLE 3.

The most abundant components of cluster Dx in the Black Sea SPM extracts (2013 expedition).

1-deoxyCER, 1-deoxyceramide; AEC, assigned elemental composition. Δ = (measured mass − calculated mass) × 1000. mmu, milli mass unit. For abbreviations of component assignment see text. Numbers in component assignment indicate total alkyl carbons (not including polar head group or glycerol moiety) and number of double bond equivalents (cf. Liebisch et al., 2013). Color scheme represents component’s depth profile, red, highest abundance and no color, lowest abundance.